Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 14
PCIe and Graphics
PCI Express Root Port 14
PCI Express Root Port 14 firmware setup page decoded from AMI HII/IFR resources.
Form ID 0x13f1
Records 34
Path Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 14
Record 3718
PCI Express Root Port 14 Firmware Value
Control the PCI Express Root Port.
Opcode OneOf
Question ID 0xda2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x10c
Width 1 byte(s)
Range 0 to 1 step 0 Permalink
Record 3719
Connection Type Firmware Value
Built-In: a built-in device is connected to this rootport.
Firmware help text Built-In: a built-in device is connected to this rootport. SlotImplemented bit will be clear. Slot: this rootport connects to user-accessible slot. SlotImplemented bit will be set.
Opcode OneOf
Question ID 0xda3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x374
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1586, "type": "GrayOutIf", "offset": 491954, "expr": ["EqIdVal QuestionId: 0xDB0, Value: 0x1"]} Permalink
Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM
Firmware help text Set the ASPM Level:
Force L0s - Force all links to L0s State
AUTO - BIOS auto configure
DISABLE - Disables ASPM
Opcode OneOf
Question ID 0x15ed
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x128
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express L1 Substates settings.
Opcode OneOf
Question ID 0x1609
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2cc
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express L1 Low Substate Enable/Disable.
Opcode OneOf
Question ID 0xda4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2e8
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Enable/Disable Access Control Services Extended Capability
Opcode OneOf
Question ID 0xda5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x304
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Enable/Disable Precision Time Measurement
Opcode OneOf
Question ID 0x1625
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x320
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Enable/Disable Downstream Port Containment
Opcode OneOf
Question ID 0xda6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x33c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Enable/Disable Rootport extensions for Downstream Port Containment
Opcode OneOf
Question ID 0xda7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x358
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express Unsupported Request Reporting Enable/Disable.
Opcode OneOf
Question ID 0xda8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x144
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express Device Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xda9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x160
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express Device Non-Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xdaa
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x17c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express Device Correctable Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xdab
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x198
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Root PCI Express System Error on Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xdac
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1ec
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Root PCI Express System Error on Non-Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xdad
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x208
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Root PCI Express System Error on Correctable Error Enable/Disable.
Opcode OneOf
Question ID 0xdae
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x224
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express PME SCI Enable/Disable.
Opcode OneOf
Question ID 0xdaf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x240
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCI Express Hot Plug Enable/Disable.
Opcode OneOf
Question ID 0xdb0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x25c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1587, "type": "GrayOutIf", "offset": 492506, "expr": ["EqIdVal QuestionId: 0xDA3, Value: 0x0"]} Permalink
Record 3736
Advanced Error Reporting Firmware Value
Advanced Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xdb1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x278
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Configure PCIe Speed
Opcode OneOf
Question ID 0xdb2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x294
Width 1 byte(s)
Range 0 to 3 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3738
Transmitter Half Swing Firmware Value
Transmitter Half Swing Enable/Disable.
Opcode OneOf
Question ID 0xdb3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2b0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3739
Detect Timeout Firmware Value
The number of milliseconds reference code will wait for link to exit Detect state for enabled ports before assuming there is no device and potentially disabling the port.
Opcode Numeric
Question ID 0xdb4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x39d
Width 2 byte(s)
Range 0 to 65535 step 1 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3740
Extra Bus Reserved Firmware Value
Extra Bus Reserved (0-7) for bridges behind this Root Bridge.
Opcode Numeric
Question ID 0xdb5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x52c
Width 1 byte(s)
Range 0 to 7 step 1 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3741
Reserved Memory Firmware Value
Reserved Memory for this Root Bridge (1-20) MB
Opcode Numeric
Question ID 0xdb6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x555
Width 2 byte(s)
Range 1 to 20 step 1 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.
Opcode Numeric
Question ID 0xdb7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x580
Width 1 byte(s)
Range 4 to 20 step 4 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
PCH PCIE Latency Reporting Enable/Disable
Opcode OneOf
Question ID 0xdb8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3f0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3744
Snoop Latency Override Firmware Value
Snoop Latency Override for PCH PCIE.
Firmware help text Snoop Latency Override for PCH PCIE.
Disabled: Disable override.
Manual: Manually enter override values.
Auto (default): Maintain default BIOS flow.
Opcode OneOf
Question ID 0xdb9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x428
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} Permalink
Record 3745
Snoop Latency Value Firmware Value
LTR Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xdba
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4a5
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} {"condition_id": 1589, "type": "SuppressIf", "offset": 492869, "expr": ["EqIdVal QuestionId: 0xDB9, Value: 0x1", "Not"]} Permalink
Record 3746
Snoop Latency Multiplier Firmware Value
LTR Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xdbb
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x444
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} {"condition_id": 1589, "type": "SuppressIf", "offset": 492869, "expr": ["EqIdVal QuestionId: 0xDB9, Value: 0x1", "Not"]} Permalink
Record 3747
Non Snoop Latency Override Firmware Value
Non Snoop Latency Override for PCH PCIE.
Firmware help text Non Snoop Latency Override for PCH PCIE.
Disabled: Disable override.
Manual: Manually enter override values.
Auto (default): Maintain default BIOS flow.
Opcode OneOf
Question ID 0xdbc
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x460
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} Permalink
Record 3748
Non Snoop Latency Value Firmware Value
LTR Non Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xdbd
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4dd
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} {"condition_id": 1590, "type": "SuppressIf", "offset": 493013, "expr": ["EqIdVal QuestionId: 0xDBC, Value: 0x1", "Not"]} Permalink
Record 3749
Non Snoop Latency Multiplier Firmware Value
LTR Non Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xdbe
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x47c
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} {"condition_id": 1588, "type": "SuppressIf", "offset": 492821, "expr": ["EqIdVal QuestionId: 0xDB8, Value: 0x0"]} {"condition_id": 1590, "type": "SuppressIf", "offset": 493013, "expr": ["EqIdVal QuestionId: 0xDBC, Value: 0x1", "Not"]} Permalink
PCIE LTR Configuration Lock
Opcode OneOf
Question ID 0xdbf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x40c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink
Record 3751
Peer Memory Write Enable Firmware Value
Peer Memory Write Enable/Disable
Opcode OneOf
Question ID 0xdc0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0xcb
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1585, "type": "SuppressIf", "offset": 491946, "expr": ["EqIdVal QuestionId: 0xDA2, Value: 0x0"]} Permalink